Grating



May 8, 1928. 1 1,669,236

L. FICK y Y GHATING Filed Feb. e. 1927 fz www Wn lumi D -w 1 5 MMM "WI'www A milf 1 i za y Y, HW(1 u; mi) W H' Il i i 2 L7 lh 3;; M M ZM lPatented May s, 1928. 7* j 1,669,236*

" *UNITED PATENT" OFFICE. n y

i i :comme Froggy 1;izooirL-irla,NEvrvom;` A i i l i i y einer;1m.'l u yl applicati@ inea rtiaary s, iaaafiselri'aino; 4v16a-ees.

This invention relates tozimprovements in configuration conforming. to.the outer con-` gratingsy adapted for use'in floors fior jareatourfoftlielip andnilepressions and shoul. ways, sidewalk openings, subwaykconstrucders ofbarlOg f f A Vj, y i. tions vor the like, andthe ymethodof making' For the reception of barl() the transverse a the same. j bars15 are subjected to bending, as indido iIt is the prineipalobject of`my, inventionifcated in Figure 5, bygmeans ofv any suitable to providea readily 'iiiade'grating of simple tool orfappara-tus,.so that" theslots ornotches and therefor inexpensive Construction, yet '16 areAsomewhat distended or expanded, durable and extremely serviceable.indicated at 17, for allowing the ready inl Another object of myinvention is the protroductionv of bar in a manner easily un- 65 visionof a novel and improved method for derstood, ivhereafter the parts arefirmly f making such gratingsby the use of simple pressed together inktheir adjusted relative tools. Y positions by hydraulic or other meansinA A further object of myV invention is the order to form a compactWhole` l5 provision of a gratingof great strength by InFigures 8 and 9 Ihave illustrated a 70 interlocking the bearing and transverse barsmethod of making a grating according to thereoif firmly b y a simplemethod. my invention by firmly connecting the bear- These and otherobjects andv advantages of ing bar l0 withk each of the transverse barsmy invention will become more fully known according to which bearing bar10 is 2" as the description thereof proceeds, and will entered firstloosely and preliminarily into 75 then be specifically defined in theappended the recess 18 of a suitable tool or die `19.

claim. One'of the branchesof said tool forming the In they accompanyingdrawing forming a central recess thereof, has an upper straightvmaterial part of this disclosure: edge, as indicated at 20, While theother Fig. 1 is the front elevation of a bearing branch on the oppositeside of the recess 18 80 bar or plate used in the construction oi thehasfan upper, pointed or beveled edge, as

grating according to my invention. indicated at 21. According to mynovel and Fig. 2 is an end vievv` thereof. improved method of makinggratings, the Fig. 3 is a front elevation ofa transverse bar 10 is firstloosely entered into the slot :io bar, straight. 17 correspondingthereto in transverse bary 85 Fig. 4: is an end view thereof. 15, andwith the lower end of bar 10 in the Y Fig. 5 shows the transverse bar,bent. rec-ess 18, the tool 19 is then driven home by Fig. (i is a viewseen in the direction of the means of any suitable Well known tool, soarrows @-6, Figure 5, partly in section. L kthat the bevel edge 21 willslidingly engage Fig. 7 is a top plan view of a grating conthe bar 10and successively press the lip 9o structed according to my invention. 12`of bar'10 into the corresponding recess Fig. 8 illustrates the firststep of my novel in bar15, and the angular notch and shout method ofmaking gratings according to my der Vwill firmly engage thecorresponding re.-

invention by the help of a special tool. cess 22 .and shoulder 23 oi'part or bar 15 4U Fig. 9 illustrates the second or final stepv to firmlyinterlock both bars. o5 of the method disclosed in Figure 8. It will beapparent that by using a corj As illustrated, the `grating comprisesbear responding number of bearing bars/m ing bars 10 each having aplurality of preftransverse bars any size of grating/may beerablyrectangular,parallel notches or reconstructedy for any desiredpurpose, and

cesses 11 cut into the upper edge Vof the bar, that these bars Will befirmly interloclced in 100 and below the saine"apluraiityzef "y 19fimir. relativev adjusted ypositions against torformed on its face,`andprojecting out of the sion and separation. W plane kot bar l0llCl-plfelably @qual in It iskto be understood that while Illiave numberto the number ofkfnotches 11, `While shown as an example thev preferredform of 5o on its opposite face the baror plate 10 has myconstructionand my method of practical V105 :formed therein a corresoonding numberofly constructing the same, such changes asfvr depressions 13 each forminganvacute angle come Within the scope of the :appended and a shoulder 14.j claim may be'made in thev general arrange- The transverse bars 15comprise each a"-'ment and the relative positionsof the parts platehaving in its loWer edge al slot/16 of a ofthe gratings and in theconstruction of '1,10

the minor details thereof Without departure from the spirit of myinvention and the principles involved.

It Will be evident, that this grating, Which I call tooth-lock joint andthe method of* making same, can also be made and executed in thereversed order from that described! above, i. e. the locking meansinstead of loeing' arranged on the hearing plates7 may also just as wellbe arranged on the transverse bars, and in this case the bearing barsmust naturally be provided with the recesses.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent is:

A grating comprisingr asupporting bar provided with a recess leading 1nfrom the edge thereof and provided at one side and at a point in spacedalinement with the recess with an outstanding lip and at the oppositeside at a point in spaced alinement with the, recess with a depressionone edge of which defines a shoulder. a transverse bar having a recessleading` in from the edge thereof, said recesses inter-engaging eachother. the-recess of the transverse bar being provided at one edge witha. notch receiving said'lip and' at an opposite edge with a shoulderengaging the shoulder at the edge of the depression in the supportingbar. Y

Signed at New York in the county of New York and State of New York this7th day of Fehr'uary, A. D. 1927. l

LUDWIG FICK.

